title: Using indirect ELISA to assess different antigens for the serodiagnosis of Fasciola gigantica infection in cattle, sheep and donkeys.
abstract: An indirect enzyme-linked immunosorbent assay (iELISA) was evaluated for its diagnostic capability in detecting antibodies against Fasciola gigantica infection in cattle, sheep and donkeys sera using crude worm, excretory-secretory and glutathione S-transferase antigens prepared from adult liver fluke. Presence of F. gigantica worms at post-mortem examination of cattle, sheep and donkey's livers was taken as a gold standard for the evaluation of the assay. The diagnostic sensitivity, specificity and accuracy percentages of iELISA were determined for each antigen. Excretory-secretory antigen gave the best results for the serodiagnosis of F. gigantica infection in cattle, sheep and donkeys using iELISA with diagnostic sensitivity percentages of 93.3%, 94.9% and 93.3%, respectively, while the specificity percentages were 96.7%, 97.2% and 96.3%, respectively, whereas the accuracy percentages were 95%, 96% and 95.7%, respectively. The diagnostic sensitivity percentages of iELISA using crude worm antigen were 96.7%, 100% and 93.3%, respectively, while the specificity percentages were 80%, 83.3% and 85.2%, respectively, whereas the accuracy percentages were 88.3%, 86.7% and 87%, respectively. The diagnostic sensitivity percentages of iELISA using glutathione S-transferase antigen were 66.7%, 71.8% and 60%, respectively, while the specificity percentages were 70%, 77.8% and 77.8%, respectively, whereas the accuracy percentages were 68.3%, 74.7% and 73.9%, respectively. Conclusively, excretory-secretory antigen dependent iELISA can be used as a reliable serodiagnostic test for F. gigantica infection in cattle, sheep and donkeys.
authors.affiliation: Department of Internal Medicine and Infectious Diseases, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt. awadwsaa@hotmail.com
authors.forename: W S
authors.initials: WS
authors.lastname: Awad
authors.forename: A K
authors.initials: AK
authors.lastname: Ibrahim
authors.forename: F A
authors.initials: FA
authors.lastname: Salib
mesh_terms: D000818:Animals; D000947:Antigens, Helminth / Q000032:analysis / Q000276:immunology*; D001652:Bile Ducts / Q000276:immunology / Q000469:parasitology; D002417:Cattle; D002418:Cattle Diseases / Q000175:diagnosis / Q000276:immunology / Q000469:parasitology*; D004591:Electrophoresis, Polyacrylamide Gel; D004797:Enzyme-Linked Immunosorbent Assay / Q000379:methods*; D018397:Equidae / Q000276:immunology / Q000469:parasitology*; D005211:Fascioliasis / Q000175:diagnosis / Q000276:immunology / Q000662:veterinary*; D005982:Glutathione Transferase / Q000276:immunology; D008099:Liver / Q000276:immunology / Q000469:parasitology; D012680:Sensitivity and Specificity; D012698:Serologic Tests / Q000379:methods / Q000662:veterinary; D012756:Sheep; D012757:Sheep Diseases / Q000175:diagnosis / Q000276:immunology / Q000469:parasitology*
chemical_list: D000947:Antigens, Helminth; D005982:Glutathione Transferase